Question

an electric circuit circuit has a fuse of 5A.find the number of 100W,220V LAMPS THAT CAN BE USED IN THIS CIRCUIT

Answer 1

suppose x number of such bulbs can be used  

power of one bulb=100W

power of x bulbs is 100xW

we know that Power= V×I

I=5A

V=220V

100x = 220 \times 5 \\ x = \frac{220 \times 5}{100} \\ x = 11

hence 11 bulbs can be used